使用cmake解决Android中对第三方库的依赖

//
// Created by Li Yanshun on 2017/6/6.
//

#ifndef SINGLELIB_LAYER1_H
#define SINGLELIB_LAYER1_H

#include <stddef.h>
#include <android/log.h>
#include <jni.h>
#include <string>

#define  LOG_E(...)  __android_log_print(ANDROID_LOG_ERROR,"Netclient",__VA_ARGS__)

#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
    std::string (*getResponse)();

    std::string (*getRequest)();

} NET_API_FUNCTIONS_TYPE_LAYER1;

extern __attribute__ ((visibility ("default"))) NET_API_FUNCTIONS_TYPE_LAYER1 net_client_layer1;

#ifdef __cplusplus
}
#endif

#endif //SINGLELIB_LAYER1_H

//
// Created by Li Yanshun on 2017/6/6.
//

#include "Layer1.h"

std::string get_response() {
    LOG_E("layer1 get response");
    return "layer1:Response";
}

std::string get_request() {
    LOG_E("layer1 get request");
    return "layer1:Request";
}


__attribute__ ((visibility ("default"))) NET_API_FUNCTIONS_TYPE_LAYER1 net_client_layer1 = {
        get_response,
        get_request,
};

cmake_minimum_required(VERSION 3.4.1)

include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp)
set(jnilibs "${CMAKE_SOURCE_DIR}/src/main/jniLibs")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${jnilibs}/${ANDROID_ABI})

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11 -fexceptions -frtti -lstdc++")

add_library(layer1 SHARED src/main/cpp/Layer1.cpp )

find_library(log-lib  log )

target_link_libraries(layer1 ${log-lib} )